Samsung XP941 128GB AHCI M.2 PCIe 2.0 x4 80mm (2280) Internal SSD - OEM
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Data Throughput Rates
Throughput rates are provided in the table below. See the performance notes regarding slower PCIe 2.0 x2 and PCIe 1.0 slots
XP941 Throughput |
PC |
Mac |
Mac |
Mac |
Windows/Linux Desktops *** | 2009-2012 Mac Pro | 2008 Mac Pro | 2006-2007 Mac Pro | |
Compatible M.2 to PCIe adapter cards | ||||
Max Sequential Read
|
512GB: 1170MB/s
256GB: 1080MB/s 128GB: 1000MB/s |
512GB: 1170MB/s
256GB: 1080MB/s 128GB: 1000MB/s |
512GB: 1170MB/s *
256GB: 1080MB/s * 128GB: 1000MB/s * |
512GB: 720MB/s **
256GB: 720MB/s ** 128GB: 720MB/s ** |
Max Sequential Write
|
512GB: 950MB/s
256GB: 800MB/s 128GB: 450MB/s |
512GB: 950MB/s
256GB: 800MB/s 128GB: 450MB/s |
512GB: 950MB/s *
256GB: 800MB/s * 128GB: 450MB/s * |
512GB: 580MB/s **
256GB: 580MB/s ** 128GB: 450MB/s ** |
Random read speed (4 KB blocks)
|
512GB: 122,000 IOPS
256GB: 120,000 IOPS 128GB: 110,000 IOPS |
512GB: 122,000 IOPS
256GB: 120,000 IOPS 128GB: 110,000 IOPS |
512GB: 122,000 IOPS *
256GB: 120,000 IOPS * 128GB: 110,000 IOPS * |
512GB: 122,000 IOPS **
256GB: 120,000 IOPS ** 128GB: 110,000 IOPS ** |
Random write speed (4 KB blocks)
|
512GB: 72,000 IOPS
256GB: 60,000 IOPS 128GB: 40,000 IOPS |
512GB: 72,000 IOPS
256GB: 60,000 IOPS 128GB: 40,000 IOPS |
512GB: 72,000 IOPS *
256GB: 60,000 IOPS * 128GB: 40,000 IOPS * |
512GB: 72,000 IOPS **
256GB: 60,000 IOPS ** 128GB: 40,000 IOPS ** |
Bootable
|
Yes (Z97, X99), others No |
Yes
|
Yes
|
Yes |
* To achieve maximum throughput in the 2008 Mac Pro, one or two of the PCIe 2.0 x16 slots must be used. These models have two x16 PCIe 2.0 slots and two x4 PCIe 1.0 slots. The latter PCIe 1.0 slots will only allow up to 585-753MB/s data transfer rates.
** From the review at barefeats.com: "Using the 'Expansion Slot Utility' in the System/Library/CoreServices folder, we reconfigured the PCIe slot speeds to various combinations of 4, 8, and 16 lane slots to benchmark the XP941. The transfer speeds above were achieved using the 4 lane slots. The 8 lane and 16 lane slots did not produce any faster transfer speeds. On other other hand, if you use a 1 lane slot, the transfer speeds drop to 200MB/s READ and 170MB/s WRITE. We tested with both OS X Leopard and Snow Leopard. OS X Tiger kernel panicked at startup. Though we didn't try it, it should also work with OS X Lion, the last Mac OS to be officially supported on the 2006 Mac Pro."
*** To achieve the listed throughput rates on a PC/Workstations/Server platform, a PCIe 2.0 x4 or higher slot is required (e.g. PCIe 2.0 x8 or PCIe 2.0 x16). PCIe 1.0 slots may provide lower performance, depending on the number of PCIe lanes allocated to the slot.
Samsung Electronics
Samsung Electronics Co., Ltd. is a South Korean multinational electronics company headquartered in Suwon, South Korea. It is the flagship subsidiary of the Samsung Group, amounting to 70% of the group's revenue in 2012, and has been the world's largest information technology company by revenues since 2009. Samsung Electronics has assembly plants and sales networks in 80 countries and employs around 370,000 people.
In July 2017, Samsung Electronics overtook Intel as the largest semiconductor chip maker in the world.